I learned today that this website is configured to shoot emails to me when comments arise, which is...actually pretty smart, as I would not have gotten this otherwise.

Given that two years have passed since I published the most recent revision, and three since the initial version, I'm not surprised at all that components it describes are non-working at this point.

I no longer maintain this document, as I have not played Dwarf Fortress for several years now.

I suggest bringing this issue up on the forums instead---just copy-paste it there, where it will be seen: http://www.bay12forums.com/smf/index.php?topic=122968.2835

If you're feeling frisky and know what you're doing, you can contribute directly by issuing a pull requests against the library's docs on GitHub: https://github.com/splintermind/Dwarf-Therapist/tree/DF2016/doc